title: Influence of biliary drainage catheter on bile duct wall thickness as measured by intraductal ultrasonography.
abstract: OBJECTIVE
  To determine the influence of biliary drainage catheter placement on bile duct wall thickness, we performed intraductal ultrasonography (IDUS) in patients before and after biliary drainage.
  
  
  METHODS
  Patients underwent IDUS before and after either short-term (n = 9, 6 to 8 days) or long-term (n = 9, 14 to 35 days) biliary drainage using a thin (2.0 mm diameter), 20 MHz probe inserted by means of a transpapillary route or a percutaneous tract. The bile duct wall thickness (mean +/- standard deviation) was retrospectively measured at the upper portion of the common hepatic duct.
  
  
  RESULTS
  The bile duct wall thickness increased from 0.8+/-0.4 mm (predrainage) to 2.0+/-1.6 mm (post-drainage) in the long-term group (p < 0.001) but was not significantly increased in the short-term group.
  
  
  CONCLUSIONS
  The bile duct wall thickness as measured on IDUS appears to be increased after placement of biliary drainage catheters.
authors.affiliation: Department of Gastroenterology, Jichi Medical School, Yakushiji, Tochigi, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Tamada
authors.forename: T
authors.initials: T
authors.lastname: Tomiyama
authors.forename: M
authors.initials: M
authors.lastname: Ichiyama
authors.forename: A
authors.initials: A
authors.lastname: Oohashi
authors.forename: S
authors.initials: S
authors.lastname: Wada
authors.forename: T
authors.initials: T
authors.lastname: Nishizono
authors.forename: S
authors.initials: S
authors.lastname: Tano
authors.forename: T
authors.initials: T
authors.lastname: Aizawa
authors.forename: K
authors.initials: K
authors.lastname: Ido
authors.forename: K
authors.initials: K
authors.lastname: Kimura
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001649:Bile Duct Diseases / Q000000981:diagnostic imaging / Q000473:pathology; D001652:Bile Ducts / Q000000981:diagnostic imaging* / Q000473:pathology; D002760:Cholangiopancreatography, Endoscopic Retrograde; D002769:Cholelithiasis / Q000000981:diagnostic imaging* / Q000473:pathology / Q000628:therapy; D004322:Drainage / Q000295:instrumentation*; D004724:Endoscopy / Q000379:methods; D019160:Endosonography / Q000379:methods*; D005260:Female; D006801:Humans; D008096:Lithotripsy; D008297:Male; D008875:Middle Aged; D012680:Sensitivity and Specificity; D014741:Video Recording